Anthony harris



ZSheets-Sheet 1.

Patented Mar. 10,- 1896.

A. HARRIS.

FEED WATER FILTER.

(No Model.)

ANDREW 5 GRAHFM PHUTU-UTHD WASHINGTON DC @No Model.) 2 SheetsSheet 2.

v A. HARRIS. FEED -WATER FILTER- No. 566,008. Patented Mar. 10, 1896.

ANDREW B 'mAHAM PmnoqmQwAsmNe-or m,

STATES ANTHONY HARRIS, OF MIDDLESBOROUGI-I, ENGLAND.

FEED-WATER FILTER.

SPECIFICATION forming part Of Letters Patent NO. 556,008, dated March 10, 1896. Application filed May 16, 1893. Serial No. 474,386. (No model.)Patented in England A ril 20,1891,N0.6,801.

To all whom it may concern.

Be it known that I, ANTHONY HARRIS, engineer, a subject of the Queen ofGreat Britain. residing at Middlesborough, in the county of York,England, have invented certain new and useful Improvements in FeedaterFilters, (for which I have received Letters Patent in Great Britain, N0. 6, 801, dated April 20, 1891,) of which the followin g is aspecification.

This invention has for its object a filter applicable for filtering orpurifying the feedwater of steam-boilersand for other purposes.

The invention is best described by aid of the accompanying drawings, inwhich Figure 1 is an elevation, partly in section,

of the filtering apparatus as a whole; Fig. a vertical section of aportion of my filter, showing a slightly-modified arrangement; Fig. 3,enlarged view of part of Fig. 1; Figs. 4c and 5, side elevation andsection of valve B.

In the drawings, A is a feed-pipe bringing the water from the pump tothe boiler or from the hot well to the feed-pumps. In the latter casethe water would be sucked through the filter, but the valve would workexactly the same and open direct communication if the vacuum behind thepump rose about the required pressure.

B is a valve weighted or screwed down to open at any given pressure, sothat if the resistance of the filter becomes more than said givenpressure the valve B opens and allows the water to pass through pipe Dto the boiler or feedpump.

O, C and O are stop-valves; T, pipe leading from valve 0 to pipe D andpipe U leading from pipe A beneath valve B to valve 0; E, a ring rivetedto shell and on which the filter rests; F F F F, four layers of flannelhaving immediately above them perforated plates G G G G. Between the twosets or pairs of plates G are brass gratings H II to support and relievethe pressure on the perforated plates G and to keep them at the rightdistances from each other, and by pressing the inner fiannels betweenthe plates G G and the internal shell of the filter to prevent thefiltering medium escaping.

I I are screws to keep the plates and internal shell G tight.

Between the two inner plates G G is a layer S of spongy iron. On the topof the upper plate a perforated bell J is pressed down by means of screwK, holding all tight, especially the two flannel joints, where the lowergrate and perforated plate rest on the supportingledge h. L is a coverfor the filter.

Referring to Figs. 4 and 5, showing two views of valve B, M is thevalve; N, a spring holding it down; 0, a gong; P, a clapper, and Q acollar on the shaft linked to the clapper of the gong.

The mode of action of the entire apparatus is as follows: The waterbeing pumped through A passes through the valve-chamber of B down thevertical pipe to the filter as long as the resistance of the filter isless than the pressure to which the valve B is weighted. The moment,however, that that pressure is momentarily exceeded the valve M rises,carrying collar Q with it, and by this means rings the gong. Thepulsations of pumping, causing the pressure to be alternately above andbelow the resistance of the filter, cause the spindle of the valve for atime to dance up and down, incessantly ringing the gong. The attendanthearing this ringing at once closes valve C and opens valve 0. The waterthen, after lifting valve B, rushes into the fiilter through valve 0cleaning out the dirt which runs off through the valve 0. The cleansingcan be done, if desired, by means of a pipe and valve, such as T,specially provided and connected to the boiler for this purpose. Thevalve 0 is again closed, the valve 0 opened, and the apparatus continuesas before. \Vhen, however, in course of time, the filter gets so corruptas to require renewing or altering, the valves 0 and O are closed, thelid L and the bell J of the filter removed, and the filter withdrawnbodily from its case. spare filter, consisting of the parts connectedtogether by the studs I, can then be put in its place and the bell J andlid L fixed on as before. The old filter can now be carefully cleaned orreplenished at leisure. It will be seen, consequently, that althoughthere may be two hundred pounds pressure to the square inch in theboiler there is never any more pressure through the filter while inactual work than what the valve B is weighted for. IVhen, however, thefilter is to be cleaned out,

the valve C can be opened or throttled to any desired extent, and thusany desired pressure put on the filter. The result is that until thefilter is nearly worn out it is found to be perfectly self-cleaning. y

I prefer spongy iron for the filtering material to charcoal or otherlike ingredients, as not merely does it act as a filter and deodorizingmaterial, but it also acts instead of zinc in separating copper from thefeed-water and thus increases the longevity of the boiler.

Instead of the spindle of valve B directly actuating the gong, when moreconvenient I attachto the spindle a circuit making and breaking device,so as to ring an electric bell near where the attendant is stationed.

I11 a slightly-modified form of my filter I dispense with the innermetal chamber of filter, Fig. l, and confine the spongy iron or filtering material in a flannel bag B, Fig. 2, placed between the two innerperforated plates G, retaining the grates and fiannels as before. Inthis case I exert pressure direct on the flannel bag R by screwing downthe perforated bell J onto the upper grate by means of a screw-spindleK. In this arrangement I have the advantage of being able, whenrequired, to relieve the pressure of the bag R of filtering materialwhen the particles get set too closely together without allowing them toescape while the filter is working.

The division-plate S in front of the valve 0, Fig. 1, directs the flowof water across the surface of theflower filtering-flannel and-tends todetach any particles of dirt adhering to it, and deposits them at theopposite side of division-plate in close proximity to the sludgevalve 0ready for removal.

To facilitate the deposition of copper as the feed water passes throughthe filter, I sometimes pass an electric current through the water bymeans of insulated wires connected to any suitable dynamo or battery.

I declare that what I claim is 1. In combination with a pipe A D adaptedto deliver water from the pump to the boiler;

" a branch U T from said pipe; a filter in said branch; and an automaticvalve B placed in the water-supply pipe between the pump and boiler, andweighted to the required resistance; whereby, when the resistance in thefilter equals or exceeds the pressure to which the valve is adjusted,the filter is thrown out of action, the current reversed, and the waterallowedto proceed direct to the boiler.

2. In combination with a filter for filtering feed-water, of theinlet-pipe A, the valve B connected thereto, pipe U between said valveand the filter, pipe D also communicating with valve B, pipe T connectedto the filter and also in communication with pipe D,and valves 0 c and 0located as shown and described, whereby when the resistance becomes tooheavy the filter is thrown out of action.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ANTHONY HARRIS. \Vitnesses:

G. O. DYMOND, IL-I. SHOOBRIDGE.

